Question

(3x+9)+(-x²-15x-40)=??

Answer 1

(3x+9)+(-x²-15x-40)=3x+9-x²-15x-40= -x²-12x-31=-(x²+12x+31)

Answer 2

To simplify the expression, combine like terms:

(3x + 9) + (-x² - 15x - 40)

First, distribute the negative sign to all the terms inside the second parenthesis:

(3x + 9) - x² - 15x - 40

Now, group the like terms together:

(3x - 15x) + 9 - 40 - x²

Combine the x terms:

-12x + 9 - 40 - x²

Finally, combine the constant terms:

-12x - 31 - x²

So, the simplified expression is: -x² - 12x - 31.